Daily Almanac for
Nov 29, 2009
Search: Infoplease Info search tips
Search: Biographies Bio search tips

Dictionary


plu•to•nism



Pronunciation: (plOOt'n-iz"um), [key]
n. Geol.
1. the intrusion of magma and associated deep-seated processes within the earth's crust.
2. (often cap.) the disproven theory that all rocks formed by solidification of a molten mass, promulgated by Scottish geologist James Hutton (1726–97).

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

plutonicplutonium
    • Cite
    • Print
    • Bookmark

 

Related Content